memory_io_buf Class Reference

Inheritance diagram for memory_io_buf:

Public Member Functions
	memory_io_buf ()
virtual ssize_t	write_file (int file, const void *buf, size_t nbytes)
virtual ssize_t	read_file (int f, void *buf, size_t nbytes)
virtual bool	close_file ()
char *	GetDataPointer ()
size_t	GetDataSize () const
Public Member Functions inherited from io_buf
void	verify_hash (bool verify)
uint32_t	hash ()
virtual int	open_file (const char *name, bool stdin_off)
virtual int	open_file (const char *name, bool stdin_off, int flag=READ)
virtual void	reset_file (int f)
	io_buf ()
virtual	~io_buf ()
void	set (char *p)
virtual size_t	num_files ()
ssize_t	fill (int f)
virtual void	flush ()
virtual bool	compressed ()
void	close_files ()
void	buf_write (char *&pointer, size_t n)
size_t	buf_read (char *&pointer, size_t n)
size_t	bin_read_fixed (char *data, size_t len, const char *read_message)
size_t	bin_write_fixed (const char *data, size_t len)

Private Attributes
vector< char >	data
size_t	readOffset

Additional Inherited Members
Static Public Member Functions inherited from io_buf
static ssize_t	read_file_or_socket (int f, void *buf, size_t nbytes)
static ssize_t	write_file_or_socket (int f, const void *buf, size_t nbytes)
static void	close_file_or_socket (int f)
static bool	is_socket (int f)
Public Attributes inherited from io_buf
v_array< char >	space
v_array< int >	files
size_t	count
size_t	current
char *	head
v_array< char >	currentname
v_array< char >	finalname
Static Public Attributes inherited from io_buf
static constexpr int	READ = 1
static constexpr int	WRITE = 2

Detailed Description

Definition at line 345 of file vwdll.cpp.

Constructor & Destructor Documentation

memory_io_buf()

memory_io_buf::memory_io_buf ( )

inline

Definition at line 348 of file vwdll.cpp.

                    : readOffset(0) {
        files.push_back(-1); // this is a hack because buf will do nothing if files is empty
    }

Member Function Documentation

close_file()

virtual bool memory_io_buf::close_file ( )

inlinevirtual

Reimplemented from io_buf.

Definition at line 365 of file vwdll.cpp.

                              {
       if (files.size() > 0) {
            files.pop();
            return true;
        }
        return false;
    }

GetDataPointer()

char* memory_io_buf::GetDataPointer ( )

inline

Definition at line 373 of file vwdll.cpp.

Referenced by VW_CopyModelData().

                           {
        return data.data();
    }

GetDataSize()

size_t memory_io_buf::GetDataSize ( ) const

inline

Definition at line 377 of file vwdll.cpp.

Referenced by VW_CopyModelData().

                               {
        return data.size();
    }

read_file()

virtual ssize_t memory_io_buf::read_file ( int  f, void *  buf, size_t  nbytes  )

inlinevirtual

Reimplemented from io_buf.

Definition at line 358 of file vwdll.cpp.

                                                               {
        nbytes = min(nbytes, data.size()-readOffset);
        copy(data.data()+readOffset, data.data()+readOffset+nbytes, reinterpret_cast<char *>(buf));
        readOffset += nbytes;
        return nbytes;
    }

write_file()

virtual ssize_t memory_io_buf::write_file ( int  file, const void *  buf, size_t  nbytes  )

inlinevirtual

Reimplemented from io_buf.

Definition at line 352 of file vwdll.cpp.

                                                                         {
        auto byteBuf = reinterpret_cast<const char*>(buf);
        data.insert(data.end(), &byteBuf[0], &byteBuf[nbytes]);
        return nbytes;
    }

Member Data Documentation

data

vector<char> memory_io_buf::data

private

Definition at line 382 of file vwdll.cpp.

readOffset

size_t memory_io_buf::readOffset

private

Definition at line 383 of file vwdll.cpp.

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The documentation for this class was generated from the following file:

• /mnt/c/w/linux/vowpal_wabbit/vowpalwabbit/vwdll.cpp